Saw-swage



(No Model.)

B. B. HANSON. SAW SWAGE.

N0. 417,11 1. Patented Feb. 24, 1891.

' UNITED STATES PATENT OFFICE.

DEMPSEY B. HANSON, OF MILWVAUKEE, WISCONSIN.

SAW-SWAG E.

SPECIFICATION forming part of Letters Patent No. 447,111, dated February24, 1891.

' Application filed June 17,1890. Serial No. 355,705. (No model.)

To all whom, it may concern:

Be it known that LDEMPSEY B. HANSON, of Milwaukee, in the county ofMilwaukee, and in the State of IVisconsimhave invented certain new anduseful Improvements in Saw- Swages; and I do hereby declare that thefollowing is a full, clear, and exact description thereof.

My invention relates to devices for swaging the teeth of saws; and theinvention consists in certain peculiar and novel features ofconstruction and arrangement, as hereinafter described, and pointed outin the appended claims.

In order that my invention may be fully understood, 1 will proceed todescribe it with reference to the accompanying drawings, in which Figure1 is a transverse vertical section of my improved device on the line 1 1of Fig. 2. Fig. 2 is avertical longitudinal section of the same on theline 2 2 of Fig. 3, certain parts being broken away to more clearlyillustrate the construction. Fig. 3 is a horizontal crosssection of thesame on the line 3 3 of Fig. 2.

The objects of myinventio'n are to produce an instrument which shallaccurately and uniformly swage the saw-teeth, so that the saw shalloperate with a uniform and rapid cutting action; also, to produce aninstrumentwhich can be rapidly adjusted to work upon different gages orwidths of saw-teeth, and, finally, to produce a simple and durableinstrument which shall be easy to manipulate and rapid and effective inits action. These results I attain by virtue of the construction which Iwill now proceed to describe.

Referring to the drawings, A designates a block, preferably of metal,which constitutes the body or frame of the machine. In the center of theunder side of this block is formed a vertical groove a, which extendslongitudinallyof the block, and the open ends of which terminate at thefront and rear sides of said block, as shown in Figs. 2 and 3. \Vithinthe upper part of this groove ais placed a bar B, which is of suchlength as to project at its ends 1) beyond the front and rear ends ofthe block A. These projecting ends hare externally screw-threaded to receive nuts 0, between which and the adj acent ends of the block A areinterposed washers c.

It will thus be seen that by tightening the groove a so as to accuratelycenter the saw-' 'teeth relative to the swagingdies.

Transversely through the block A are formed two cylindrical sockets F,the outer parts f of which are of greater diameter than the innerportions f. These channels are in precise axial alignment with eachother and' their inner ends open atopposite sides of the groove a. Theouter portionsfof the sockets F are internally screw-threaded, as shownat g, to receive the external screw-threads h of the die-forcing screwsH. Theinner ends of these screws H abut against the outerends 'L'of theswaging-dies I, the latter being separate from said screws and theirstems extending outwardly within the enlarged portions f of the channelsF. The inner portions g of the sockets F are smooth on their innersurfaces, and the outer ends t'of the diesare enlarged to form headswhich fit closely in these parts of the sockets. 'Spiral springsv Jsurround the stems of the dies'I and are confined between the heads iofthe dies and the shoulders g at the inner ends of the wider portions fof the sockets. The heads 2' of the dies I Work within the reducedportions f of the sockets F, and the inner extremities or faces of thesedies are beveled upward and outwardly, as shown at i so that when thedies come into contact with the sides of the saw-teeth the latter shallbe properly and uniformly swaged on both sides without any possibilityof unevenness or irregularity of form.- The angular portions 70 of theouter ends of the screws H are surrounded by collars K, and the plaincylindrical portions 70 of said outer ends are surrounded by the hubs mof two levers M, the .said hubs and collars being confined in describedposition by nuts '11, which are screwed upon the outer cord with thegage or thickness of the teeth,

' responds in length with the block A.

extremities of the die-forcing screws II. The adjacent faces of thecollars K and hubs m are serrated, as shown at n, for a purpose to behereinafter explained,

The levers M are connected at their upper or outer ends by a rod 0,which extends loosely through said ends of the levers and which isconfined therein by nuts 0, as shown. Between the levers M the rod 0 issurrounded by a handle 0, which is necessarily of less length than theminimum space between said levers M, as indicated at p.

In order to accurately guide the saw within the groove CL and retain itcentrally of the width of said groove, I provide two inverted L-shapedguide-plates Q, each of which cor- The upper portion of each of theseguide-plates is formed with two or more transverse slots (1, through,each .of which passes a set-nut B, said nuts entering the bottom of theblock, and thus confining the guide-plates beneath the same. The lowerparts g of these guideplates rest lightly against the sides of the saw,as shown in Fig. 1.

The general operation of the structure above described is as follows:When the teeth of a saw are to be swaged, the guides Q are firstadjusted toward or away from each other to correspond with the gage orthickness of the saw, this operation being performed by loosening theset-nuts R, moving the guide-plates Q toward or away from each other, asrequired, and then tightening said set-nuts. The forming-dies 1? arecorrespondingly adjusted to ac rately adjusted to conform with all ofthe requirements of the saw,the device is placed upon the edge of thesaw so that the point of one of the teeth shall rest against the stop D.The handle O is-now forced forward, causing the forcing-screws to pushthe dies against the sides of the teeth. The beveled edges of the diespress the metal uniformly on both sides of the tooth, making a perfectlytrue tooth. The handle is now thrown in the opposite direction, causingthe screws II to move outward and allowing the springs J to retract thedies. These operations are successively repeated until allof the teethare properly and uniformly compressed, after which, if necessary, thevarious parts of the instrument may be readjusted for saws of adifferent gage from that last operated upon.

It will thus be seen that I have devised an extremely simple and durablesaw-swage, the manipulations of which are easy and rapid and the partsof which can be readily adjusted for all the requirements ofsaw-swaging.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is

1. In a saw-swage, oppositely-moving screws for actuating theswage-dies, connected levers for revolving the screws, serrated collarson the screws, and serrations on the hubs of the levers for engagementwith those of the collars, substantially as set forth.

2. An improved saw-swage comprising a longitudinally-slotted block orframe and a bar securedlongitudinally within said slot by end nuts andhaving onits underside a shoulder or stop to engage the saw-teeth,substantially as set forth.

3. An improved saw-swage comprising a longitudinally-slotted block orframe having two oppositely-disposed sockets or channels at right anglesto the slot and-of greater diameter at their outer than at their innerportions, the outerportions of said sockets being internally screwthreaded, oppositely disposed dies located in the smaller portions ofthe sockets, spiral retracting springs surrounding the dies within saidsmaller portions of the sockets, externally-threaded die-forcin g screwslocated in the larger portions of the 'sockets, an d actuating-leversoperatively con- DEMPSEY B. HANSON.

\Vitnesses:

H. G. UNDERWooD, LAWSON Scorr.

